RHSA-2026:14874 - Security Advisory

Topic

An update is now available for Red Hat Satellite 6.16 for RHEL 8 and RHEL 9.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

Description

Red Hat Satellite is a system management solution that allows organizations
to configure and maintain their systems without the necessity to provide
public Internet access to their servers or other client systems. It
performs provisioning and configuration management of predefined standard
operating environments.

Security Fix(es):

• python-pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image (CVE-2026-25990)
• candlepin: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects (CVE-2026-27727)
• python-markdown: denial of service via malformed HTML-like sequences (CVE-2025-69534)
• python-pyOpenSSL: DTLS cookie callback buffer overflow (CVE-2026-27459)
• rubygem-activesupport: Active Support: Denial of Service via large scientific notation strings (CVE-2026-33176)

Bug Fix(es):

• Satellite manifest consumer profile cert and key found in satellite client rhsm cache (SAT-43030)
• All communication should happen only over https during global registration execution (SAT-44031)
• Impossible to generate registration command via REST API in isolated networks managed by external capsules (SAT-44032)
• Executing the 'katello::clean_backend_objects' rake task takes a long time to complete (SAT-44033)
• Puppet fact parser can't create OS entry blocking Satellite leapp upgrades (SAT-44035)
• No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method (SAT-44036)
• Proxy password shown in clear text in the Overview page of Virt-who Configuration (SAT-43834)
• Non-admin users on Satellite with viewer role, unable to see the hostgroup. (SAT-44034)

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For detailed instructions how to apply this update, refer to:

https://docs.redhat.com/en/documentation/red_hat_satellite/6.16/html/updating_red_hat_satellite/index

Affected Products

• Red Hat Satellite 6.16 for RHEL 9 x86_64
• Red Hat Satellite 6.16 for RHEL 8 x86_64
• Red Hat Satellite Capsule 6.16 for RHEL 9 x86_64
• Red Hat Satellite Capsule 6.16 for RHEL 8 x86_64
• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for x86_64 8 x86_64

Fixes

• BZ - 2439170 - CVE-2026-25990 pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image
• BZ - 2442671 - CVE-2026-27727 com.mchange/mchange-commons-java: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects
• BZ - 2444839 - CVE-2025-69534 python-markdown: denial of service via malformed HTML-like sequences
• BZ - 2448503 - CVE-2026-27459 pyOpenSSL: DTLS cookie callback buffer overflow
• BZ - 2450551 - CVE-2026-33176 Rails: Active Support: Active Support: Denial of Service via large scientific notation strings
• SAT-43834 - Proxy password shown in clear text in the Overview page of Virt-who Configuration [satellite_6.16]
• SAT-44030 - Satellite manifest consumer profile cert and key found in satellite client rhsm cache [satellite_6.16]
• SAT-44031 - All communication should happen only over https during global registration execution [satellite_6.16]
• SAT-44032 - Impossible to generate registration command via REST API in isolated networks managed by external capsules [satellite_6.16]
• SAT-44033 - Executing the 'katello::clean_backend_objects' rake task takes a long time to complete [satellite_6.16]
• SAT-44034 - Non-admin users on Satellite with viewer role, unable to see the hostgroup [satellite_6.16]
• SAT-44035 - Puppet fact parser can't create OS entry blocking Satellite leapp upgrades [satellite_6.16]
• SAT-44036 - No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method [satellite_6.16]

CVEs

• CVE-2025-69534
• CVE-2026-25990
• CVE-2026-27459
• CVE-2026-27727
• CVE-2026-33176

References

• https://access.redhat.com/security/updates/classification/#important